Recreate using:
go anywhere on a server with a void world
type this command: /fill ~ ~ ~ ~40 ~ ~40 quartz_block
go to roughly the middle of the area
break one block
replace the block that is missing
you will get huge lag for around half a second, as will everyone else on the server
If you make the area of blocks two high this does not occur.
Related issues
duplicates
Comments
migrated
migrated
It does look similar, like the top commenter said the root.tick.keyboard lags a lot.
I was assuming it had to do with block updates, because it's only when it's a block part of a largely filled area.
migrated
It's most definitely the same issue, glass does not generate the same problem.
migrated
Thanks.
Does MC-11571 describe your issue? This looks like the same thing (lighting updates)